Care to actually point out a flaw instead of replying with a low-value comment that serves no purpose other than stroking your own ego?
Yes, another user has already established ELF would be bad. Microwave would work completely fine however.
A 34.9 mm x 9 mm strip antenna would work more than adequately. Transmission from a geostationary satellite, or better a passing aircraft, could penetrate most non-metal structures (at least into the outer rooms) and would work.
You could easily fit the entire circuit into capacitors used in many power supplies, taking out a power supply is enough to take out hardware long enough to begin an attack (especially if combined with digital attacks on the grid and other critical infrastructure) or to simply cause some sort of economic damages.
And actually, there's a certain type of Atari power brick that is prone to destroying Atari computers as they are highly prone to failure which causes excess voltage being pumped into the machine as the last act of the power supply. The dreaded 'ingot' power supply (part number C061982). Do you know how many people open up wall warts/power bricks? Basically zero and many are actually un-serviceable as they are epoxied shut.